16.能简算的要用简便计算.
| 7.27-(1.27-0.56) | 9.42-2.3+1.48-3.7 | 16.27+5.8+3.73 |
| 22.9-13.68﹢12.73 | 8.76﹢0.35﹢1.24 | 9.48﹢0.7-9.48﹢0.7 |
| 15.49-(5.49-4.83) | 9.42+(3.4-1.42) | 15.3-4.65+4.7-5.35. |
15.直接写出得数.
0 138554 138562 138568 138572 138578 138580 138584 138590 138592 138598 138604 138608 138610 138614 138620 138622 138628 138632 138634 138638 138640 138644 138646 138648 138649 138650 138652 138653 138654 138656 138658 138662 138664 138668 138670 138674 138680 138682 138688 138692 138694 138698 138704 138710 138712 138718 138722 138724 138730 138734 138740 138748 199269
| $\frac{5}{7}$+$\frac{1}{2}$= | $\frac{5}{12}$+$\frac{1}{12}$= | 1-$\frac{1}{2}$= | 2-$\frac{5}{7}$-$\frac{2}{7}$= |
| $\frac{3}{4}$-0.25= | $\frac{7}{3}$+$\frac{2}{3}$= | 12.5×8= | $\frac{2}{3}$+$\frac{1}{5}$-$\frac{2}{3}$+$\frac{1}{5}$= |